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String Concat problem, not working

I am trying to concat 9 edit controls. I don't see why this code is not working. Can anyone help me get this working?

    char szCombo1[2], szCombo2[2],szCombo3[2],
         szCombo4[2],szCombo5[2],szCombo6[2],
         szCombo7[2],szCombo8[2],szCombo9[2];
     
    GetDlgItemText(gl_hWnd, IDC_COMBO1, szCombo1, strlen(szCombo1));
    GetDlgItemText(gl_hWnd, IDC_COMBO2, szCombo2, strlen(szCombo2));
    GetDlgItemText(gl_hWnd, IDC_COMBO3, szCombo3, strlen(szCombo3));
    GetDlgItemText(gl_hWnd, IDC_COMBO4, szCombo4, strlen(szCombo4));
    GetDlgItemText(gl_hWnd, IDC_COMBO5, szCombo5, strlen(szCombo5));
    GetDlgItemText(gl_hWnd, IDC_COMBO6, szCombo6, strlen(szCombo6));
    GetDlgItemText(gl_hWnd, IDC_COMBO7, szCombo7, strlen(szCombo7));
    GetDlgItemText(gl_hWnd, IDC_COMBO8, szCombo8, strlen(szCombo8));
    GetDlgItemText(gl_hWnd, IDC_COMBO9, szCombo9, strlen(szCombo9));
              
    std::string strCombo1(szCombo1);
    std::string strCombo2(szCombo2);
    std::string strCombo3(szCombo3);
    std::string strCombo4(szCombo4);
    std::string strCombo5(szCombo5);
    std::string strCombo6(szCombo6);
    std::string strCombo7(szCombo7);
    std::string strCombo8(szCombo8);
    std::string strCombo9(szCombo9);
    std:string strUserCombo;
    strUserCombo = strCombo1+strCombo2+strCombo3+strCombo4+strCombo5+strCombo6+strCombo7+strCombo8+strCombo9;
    MessageBox(NULL,strUserCombo.c_str(),"DEBUG",NULL);

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Thanks!

jkr

In the above, 'strlen()' will return 0 or an undefined value, that's why that won't work. You need to provide the actual size of the buffer as the last argument. Are you sure that should be two bytes?

edvinson

ASKER

I am not sure it should be two bytes, I am expecting the user to enter two digits, thats why i chose 2 bytes. should I only use 1? Or something different? What if I dont know how many characters they entered?

ASKER CERTIFIED SOLUTION

jkr

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